An expert on nuclear proliferation at the RAND Corporation in the United States, Brian Jenkins,says because of its proximity to Somalia and its close ties to the West, Kenya is vulnerable to the worst-case scenario, where an al-Qaida terrorist unleashes a "dirty bomb" in Nairobi causing the death of thousands.

VOA: standard.2009.05.01

What does it mean to meet another person in such a close proximity?

跟一个人如此近距离的接触,是什么样的感觉？

普林斯顿公开课 - 人性课程节选